Allow search strings to persist when music source is switched

This bug is an upstream one and it would be quite helpful if somebody experiencing it could send the bug the to the people writing the software. You can learn more about how to do this for various upstreams at https://wiki.ubuntu.com/Bugs/Upstream.
Once submitted upstream , do report back here with the upstream bug number.
Thanks in advance!

This bug has been forwarded upstream , you can follow it at: https://bugzilla.gnome.org/show_bug.cgi?id=619694

 - Rhythmbox is no longer the default music player. Closing papercut
For further information about papercuts criteria, please read https://wiki.ubuntu.com/PaperCut.
Don't worry though, this bug has been marked as "Invalid" only in the papercuts project.

Reopening as part of a review of closed paper cuts.

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Some observations

1. When I select Radio source, grey text in the search box shows "Search your internet radio stations" - this is "accurate"
2. When I select my music library, grey text in search box shows "Search all fields" - this is misleading
3. Confirmed the search box is cleared when I switch music source

I think the "bug" here is the misleading "search all fields text". I also agree there is a usability improvement that could be made to persist the text in the search box.